Saturday 9.2.2013

2013-02-109:00 meeting EBH 1

02:42 stable beams fill 3541 7:45 beam dump by BPMS IP6 after 5 h in stable beams 8:35 re-injecting for LHCb VdM scan 338/338 bunches/beam 10:40 stable beams fill 3542 11:13 ALICE leveling reached head-on: start Van der Meer scan and

length scale calibration in LHCb 13:30 VdM scan completed, re-optimize all collisions 15:00-15:19 Adjust:

Test for 50Hz noise / instability studies by separating the beams and reducing / switching off the ADT gain

15:19 operator beam dump 16:09 re-injecting 18:31 stable beams fill 3543

Saturday 9.2.2013

2013-02-109:00 meeting EBH 2

Satellite population comparable to last VdM scan

2013-02-109:00 meeting EBH 3

19:39 ALICE leveling in head-on 1:06 beam dump by BPMS IP6

after 6.5 h in stable beams

1:54 re-injecting – very good beam from injectors

3:28 stable beams fill 3544

Night

B1H

B1V

2013-02-109:00 meeting EBH 4

6:04 OP dump of the last Pb-p fill after 2.5 h in stable beams

ATLAS records    

Morning

ALICE: 31.14 nb-1     

ATLAS: 30.25 nb-1     

CMS: 30.79 nb-1     

LHCb: 2.08 nb-1

2013-02-109:00 meeting EBH 5

Day of Records

2013-02-109:00 meeting EBH 6

Stable Beams Statistics

Fill DayPeak L

[1028 cm-2s-1]

Stable beam [h]

Int L [nb-1] Dump # bunches

[Pb/p]

3523 Mon 4/2 7.2 4:22 0.74 BPMS IP6 192 / 2163524 Mon 4/2 7.4 3:14 (+0:33) 0.43 BPMS IP6 192 / 2163525 Mon 4/2 10 2:09 0.64 Trip of RQTL9.R3B2 338 / 3383527 Tue 5/2 10 4:22 1.04 BPMS IP6 338 / 3383529 Tue 5/2 10 2:08 0.64 S12 trip, likely SEU 338 / 3383533 Wed 6/2 10.7 3:57 1.09 BPMS IP6 338 / 3383534 Wed 6/2 11.5 5:03 1.28 BPMS IP6 338 / 338

3535 Thu 7/2 10.2 5:07 1.33 SIS orbit correctors (EoF test) 338/338

3537 Thu 7/2 10 5:16 0.8 (VdM) BPMS IP6 314/272

3538 Fri 8/2 9.6 10:00 1.98 (ALICE only) BPMS IP6 338/338

3540 Fri 8/2 8.5 1:57 0.5 (VdM) QPS RQX.L8 314/2723541 Sat 9/2 11.6 5:03 1.28 BPMS IP6 338/3383542 Sat 9/2 11.7 3:57 1.17 OP dump 338/3383543 Sat 9/2 12.4 6:34 1.67 OP dump 338/338

2013-02-109:00 meeting EBH 7

Access starts at 7:00 Already done:

- hypercycle change- RF ramp rate back to 40Hz/s- ADT injection gain to 0.08 (to be checked/confirmed)- launched ALICE solenoid/dipole sequences for polarity change- launched RU.L4 reset sequence

Preparations for pp run

2013-02-109:00 meeting EBH 8

Access to set-up for the higher intensity start at 7:00 AM BPMS IP6 (high intensity protons), BBQ, Head-Tail, etc ADT settings for high intensity (HW SR4) and possibly attenuator change

(piquet) Re-activate RF hardware interlock on total voltage (can be done before during

ramp down) Reverting ALICE polarity (LHCb polarity already good) Revert BLM MFs Revert BTVDD delay settings Revert BPMS interlock windows to 70/100 ATLAS, CMS

• Pre-cycle ~ 1 hour

• 1 cycle with probes for checkout, correcting chroma and tune, verify instrumentation and damper set-up 10:00 – 14:00

• Testing of interlock BPMS (~2 hours)

• Loss maps at injection and asynchronous dump (4 hours)

1.38 TeV p-p run

2013-02-109:00 meeting EBH 9

• 1 cycle with 5 bunches 8-9x10^10 p/bunch for collimator setup (TCTs), collision setup, first loss maps & asynch. dump test in collision. (4-5 hours+ RP set-up and 1 hour data taking - if approved)

• BSRT (B2) and beam dump checks with high intensity and LBDS check (B1) in parallel (5 hours)

• 1 cycle to complete off-momentum/betatron loss maps (4 hours).

The hypercycle for 1.38 TeV is : 1.38TeV_2013. Set total RF voltage to 10 MV at flat top for both beams. B1 is at 12 MV now.

1.38 TeV p-p run

2013-02-109:00 meeting EBH 10

Intensity ramp-up 1 fill with ~80 bunches 1 fill with ~500 bunches (including some individual bunches for

VdM scans) 1374 bunches Need to define filling scheme for 500 bunches

1.38 TeV p-p run

2013-02-109:00 meeting EBH 11

Validation

Injection (Inj. Prot. IN)

Injection (Inj. Prot. OUT)

Flat-top separated

Un-Squeezed Collision

Betatronic-H tbd tbd tbd tbd

Betatronic-V tbd tbd tbd tbd

Neg. off-mom tbd -- -- tbd (+500 Hz)

Pos. off-mom tbd -- -- --

Asynch dump tbd -- -- tbd

tbd=to be done

2013-02-109:00 meeting EBH 12

Accesses for quench test: Scope installation in IP6 (12L6). 2 hours. It has priority over Q6L8 scope

installation because we will need it on Monday morning (the first quench test). To be confirmed whether it can be done before high intensity tests/pp physics at intermediate energy

Fast measurement system on RQ6.L8 (30 min in the UA83 by Jaromir Ludwig). Ramp to 300 A afterwards.

LBDS check (E. Carlier – working hours) if in the shadow of another access

Pending

2013-02-109:00 meeting EBH 13

2013-02-109:00 meeting EBH 14

Fills that did not make it into stable beams

Fill Day Dump

3526 Tue 5/2 Switching on OFB after cogging

Losses IP7: Noisy BPM IP8 leads to orbit drift

3528 Tue 5/2 Switching on OFB after cogging Problem diagnosed and BPM disabled

3531 Tue 5/2 Losses at start of ramp, IP3 collimation

Reduce blow-up at injection (from 1.4 to 1.1ns)

3532 Tue 5/2 Same problem with BPM as above – BPM was mysteriously re-enabled

3536 Thu 7/2 After cogging: SIS position interlock

Joerg has increased the limit for the orbit position SW_interlock by 0.2mm and Delphine added +4Hz to the cogging frequency trims to move the p+ beam closer to the center.

3539?